Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optik

Gaussian quantum discord and EPR steering in optomechanical system

Mohamed Amazioug, Mostafa Nassik, Nabil Habiballah

Published Jan 3, 2018• 23 citations
Publisher
DOI
10.1016/j.ijleo.2017.12.160

Related papers

Entanglement, EPR steering and Gaussian geometric discord in a double cavity optomechanical systems

Mohamed Amazioug, Mostafa Nassik, Nabil Habiballah

The European Physical Journal D•Oct 1, 2018•34 citations

Gaussian geometric discord, entanglement and EPR steering of two rotational mirrors in a double-Laguerre-Gaussian cavity optomechanics in the presence of YIG sphere

Noura Chabar, M’bark Amghar, S. K. Singh +1 more

Quantum Information Processing•Sep 29, 2025•3 citations

Multi-Mode Quantum Steering In An Optomechanical System

Abdulmajeed Almutairi

•Jan 1, 2019•0 citations

Dynamical Gaussian quantum steering in optomechanics

Jamal El Qars, Mohammed Daoud A, R. Ahl Laamara

arXiv:1806.10476•The European Physical Journal D•May 1, 2017•16 citations

Measure of general quantum correlations in optomechanics

Mohamed Amazioug, Mostafa Nassik, Nabil Habiballah

In this paper, we analyze nonclassical correlations between bipartite states in two optomechanical systems. The first system (Sec. 2) consists of two nanoresonators spatially separated by broadband squeezed light, where each cavity has a fixed mirror and a movable one. The second system (Sec. 3) is an atom-optomechanical system consisting of an atomic ensemble placed inside an optical nanoresonator with a vibrating mirror. For both optomechanical systems, we give the Hamiltonian and the explicit expression of covariance matrix leading to the quantum equations describing the dynamic evolution of the system. Then, the nonclassical correlations are quantified using the logarithmic negativity and Gaussian quantum discord. We propose also a scheme for examining the evolution of Gaussian quantum steering and its asymmetry in each system. We show that the entanglement of the two mechanical modes is very strongly related to the parameters characterizing the environment where the movable mirrors evolve, in particular the squeeze parameter, the optomechanical cooperativity and thermal bath temperature.

International Journal of Quantum Information•Aug 1, 2018•19 citations

Classifying Directional Gaussian Entanglement, Einstein-Podolsky-Rosen Steering, and Discord

Qiongyi He, Qihuang Gong, M. D. Reid

Using Venn diagrams, we classify the different types of two-mode Gaussian continuous variable quantum correlation including directional entanglement and Einstein-Podolsky-Rosen (EPR) steering. We establish unified signatures for one- and two-way quantum steering, entanglement, and discord beyond entanglement in terms of an EPR-type variance. By focusing on Gaussian states, we link an optimized condition for entanglement based on an EPR variance to the Simon-Peres condition. This allows us to quantify the asymmetry of the Gaussian entanglement, and to relate the asymmetry to a directional quantum teleportation protocol where Alice and Bob possess asymmetrically noisy channels. Our analysis enables a determination of the type and direction of quantum correlation in a way that is easily measured in experiment. We also find that for symmetric states, when discord exceeds a certain threshold, the states are necessarily steerable.

arXiv:1406.6708•Physical Review Letters•Feb 12, 2015•133 citations
In this paper, we analyze nonclassical correlations between bipartite states in two optomechanical systems. The first system (Sec. 2) consists of two nanoresonators spatially separated by broadband squeezed light, where each cavity has a fixed mirror and a movable one. The second system (Sec. 3) is an atom-optomechanical system consisting of an atomic ensemble placed inside an optical nanoresonator with a vibrating mirror. For both optomechanical systems, we give the Hamiltonian and the explicit expression of covariance matrix leading to the quantum equations describing the dynamic evolution of the system. Then, the nonclassical correlations are quantified using the logarithmic negativity and Gaussian quantum discord. We propose also a scheme for examining the evolution of Gaussian quantum steering and its asymmetry in each system. We show that the entanglement of the two mechanical modes is very strongly related to the parameters characterizing the environment where the movable mirrors evolve, in particular the squeeze parameter, the optomechanical cooperativity and thermal bath temperature.
Using Venn diagrams, we classify the different types of two-mode Gaussian continuous variable quantum correlation including directional entanglement and Einstein-Podolsky-Rosen (EPR) steering. We establish unified signatures for one- and two-way quantum steering, entanglement, and discord beyond entanglement in terms of an EPR-type variance. By focusing on Gaussian states, we link an optimized condition for entanglement based on an EPR variance to the Simon-Peres condition. This allows us to quantify the asymmetry of the Gaussian entanglement, and to relate the asymmetry to a directional quantum teleportation protocol where Alice and Bob possess asymmetrically noisy channels. Our analysis enables a determination of the type and direction of quantum correlation in a way that is easily measured in experiment. We also find that for symmetric states, when discord exceeds a certain threshold, the states are necessarily steerable.